Light emitting device

Abstract

A light emitting device comprising an anode, a cathode, a first light emitting layer between the anode and the cathode, and a second light emitting layer between the anode and the cathode is provided. The first light emitting layer comprises a metal complex represented by formula (1): In formula (1), M 1 represents an iridium atom, n 1 represents an integer of 1 or more, n 2 represents an integer of 0 or more, n 1 +n 2 is 2 or 3, ring R 1A represents a triazole ring containing a nitrogen atom, E 1 , E 11A , E 12A , and a carbon atom, ring R 2 represents an aromatic hydrocarbon ring, E 1 , E 2 , E 11A , and E 12A each represent a nitrogen atom, R 11A and R 12A represent an aryl group, R 13A represents an aryl group, A 1 -G 1 -A 2 represents an anionic bidentate ligand, A 1 and A 2 each represent a nitrogen atom, and G 1 represents a single bond.

1 . A light emitting device, comprising:
 an anode;   a cathode;   a first light emitting layer provided between the anode and the cathode; and   a second light emitting layer provided between the anode and the cathode,   wherein the first light emitting layer comprises a metal complex represented by formula (1):   
       
         
           
           
               
               
           
         
         wherein 
         M 1  represents a rhodium atom, a palladium atom, an iridium atom or a platinum atom, 
         n 1  represents an integer of 1 or more, n 2  represents an integer of 0 or more, and n 1 +n 2  is 2 or 3, 
         when M 1  is a rhodium atom or an iridium atom, n 1 +n 2  is 3, and when M 1  is a palladium atom or a platinum atom, n 1 +n 2  is 2, 
         the ring R 1A  represents a triazole ring or a diazole ring constituted of a nitrogen atom, E 1 , E 11A , E 12A , and a carbon atom, 
         the ring R 2  represents an aromatic hydrocarbon ring or an aromatic heterocyclic ring, and these rings each may have a substituent; when there are a plurality of the substituents, they may be the same or different and may be bonded to each other to form a ring together with the atoms to which they are bonded; and when there are a plurality of the ring R 2 , they may be the same or different, 
         E 1  represents a carbon atom, and E 2 , E 11A , and E 12A  each independently represent a nitrogen atom or a carbon atom; when there are a plurality of E 2 , E 11A  and E 12A , they may be the same or different at each occurrence, 
         R 11A  and R 12A  each independently represent a hydrogen atom, an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryl group, an aryloxy group, a monovalent heterocyclic group, a substituted amino group, or a halogen atom, and these groups each may have a substituent; when there are a plurality of R 11A  and R 12A , they may be the same or different at each occurrence; R 11A  and R 12A  may be bonded to each other to form a ring together with the atoms to which they are bonded; and R 11A  and an optional substituent of the ring R 2  may be bonded to each other to form a ring together with the atoms to which they are bonded, 
         when E 11A  is a nitrogen atom, R 11A  may be present or absent, and when E 12A  is a nitrogen atom, R 12A  may be present or absent, 
         R 13A  represents an aryl group, a monovalent heterocyclic group, or a substituted amino group, and these groups each may have a substituent; when there are a plurality of R 13A , they may be the same or different; and R 12A  and R 13A  may be bonded to each other to form a ring together with the atoms to which they are bonded, and 
         A 1 -G 1 -A 2  represents an anionic bidentate ligand, A 1  and A 2  each independently represent a carbon atom, an oxygen atom or a nitrogen atom, and these atoms each may be atoms constituting a ring; G 1  represents a single bond or an atomic group constituting the bidentate ligand together with A 1  and A 2 ; and when there are a plurality of A 1 -G 1 -A 2 , they may be the same or different. 
       
     
     
         2 . The light emitting device according to  claim 1 , wherein the second light emitting layer comprises
 a metal complex represented by formula (2):   
       
         
           
           
               
               
           
         
         wherein 
         M 2  represents a rhodium atom, a palladium atom, an iridium atom or a platinum atom, 
         n 3  represents an integer of 1 or more, n 4  represents an integer of 0 or more, and n 3 +n 4  is 2 or 3; when M 2  is a rhodium atom or an iridium atom, n 3 +n 4  is 3; and when M 2  is a palladium atom or a platinum atom, n 3 +n 4  is 2, 
         E 4  represents a carbon atom or a nitrogen atom, 
         the ring L 1  represents a 6-membered aromatic heterocyclic ring, which may have a substituent; when there are a plurality of the substituents, they may be the same or different and may be bonded to each other to form a ring together with the atoms to which they are bonded; and when there are a plurality of the ring L 1 , they may be the same or different, 
         the ring L 2  represents an aromatic hydrocarbon ring or an aromatic heterocyclic ring, and these rings each may have a substituent; when there are a plurality of the substituents, they may be the same or different and may be bonded to each other to form a ring together with the atoms to which they are bonded; and when there are a plurality of the ring L 2 , they may be the same or different, 
         an optional substituent of the ring L 1  and an optional substituent of the ring L 2  may be bonded to each other to form a ring together with the atoms to which they are bonded, and 
         A 3 -G 2 -A 4  represents an anionic bidentate ligand, A 3  and A 4  each independently represent a carbon atom, an oxygen atom or a nitrogen atom, and these atoms each may be atoms constituting a ring; G 2  represents a single bond or an atomic group constituting the bidentate ligand together with A 3  and A 4 ; and when there are a plurality of A 3 -G 2 -A 4 , they may be the same or different. 
       
     
     
         3 . The light emitting device according to  claim 1 , wherein the second light emitting layer comprises at least one selected from the group consisting of:
 a polymer compound comprising a constitutional unit having a group formed by removing from a metal complex represented by formula (2) one or more hydrogen atoms directly bonded to a carbon atom or a heteroatom constituting the metal complex; and   a crosslinked product of the polymer compound   
       
         
           
           
               
               
           
         
         wherein 
         M 2  represents a rhodium atom, a palladium atom, an iridium atom or a platinum atom, 
         n 3  represents an integer of 1 or more, n 4  represents an integer of 0 or more, and n 3 +n 4  is 2 or 3; when M 2  is a rhodium atom or an iridium atom, n 3 +n 4  is 3; and when M 2  is a palladium atom or a platinum atom, n 3 +n 4  is 2, 
         E 4  represents a carbon atom or a nitrogen atom, 
         the ring L 1  represents a 6-membered aromatic heterocyclic ring, which may have a substituent; when there are a plurality of the substituents, they may be the same or different and may be bonded to each other to form a ring together with the atoms to which they are bonded; and when there are a plurality of the ring L 1 , they may be the same or different, 
         the ring L 2  represents an aromatic hydrocarbon ring or an aromatic heterocyclic ring, and these rings each may have a substituent; when there are a plurality of the substituents, they may be the same or different and may be bonded to each other to form a ring together with the atoms to which they are bonded; and when there are a plurality of the ring L 2 , they may be the same or different, 
         an optional substituent of the ring L 1  and an optional substituent of the ring L 2  may be bonded to each other to form a ring together with the atoms to which they are bonded, and 
         A 3 -G 2 -A 4  represents an anionic bidentate ligand, A 3  and A 4  each independently represent a carbon atom, an oxygen atom or a nitrogen atom, and these atoms each may be atoms constituting a ring; G 2  represents a single bond or an atomic group constituting the bidentate ligand together with A 3  and A 4 ; and when there are a plurality of A 3 -G 2 -A 4 , they may be the same or different. 
       
     
     
         4 . The light emitting device according to  claim 3 , wherein the constitutional unit is a constitutional unit represented by formula (1B), a constitutional unit represented by formula (2B), a constitutional unit represented by formula (3B), or a constitutional unit represented by formula (4B):
   L c  n     c1   M 1B   (1B)
   wherein   M 1B  represents a group formed by removing from the metal complex represented by the formula (2) one hydrogen atom directly bonded to a carbon atom or a heteroatom constituting the metal complex,   L C  represents an oxygen atom, a sulfur atom, —N(R A )—, —C(R B ) 2 —, —C(R B )═C(R B )—, —C≡C—, an arylene group, or a divalent heterocyclic group, and these groups each may have a substituent; R A  represents a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group, or a monovalent heterocyclic group, and these groups each may have a substituent; R B  represents a hydrogen atom, an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryl group, or a monovalent heterocyclic group, and these groups each may have a substituent; the plurality of R B  may be the same or different and may be bonded to each other to form a ring together with the carbon atom to which they are bonded; and when there are a plurality of L C , they may be the same or different, and   n c1  represents an integer of 0 or more;   
       
         
           
           
               
               
           
         
         wherein 
         M 1B  represents the same meaning as described above, 
         L d  and L e  each independently represent an oxygen atom, a sulfur atom, —N(R A )—, —C(R B ) 2 —, —C(R B )═C(R B )—, —C≡C—, an arylene group, or a divalent heterocyclic group, and these groups each may have a substituent; R A  and R B  represent the same meaning as described above; and when there are a plurality of L d  and L e , they may be the same or different at each occurrence, 
         n d1  and n e1  each independently represent an integer of 0 or more, and the plurality of n d1  may be the same or different, and 
         Ar lM  represents an aromatic hydrocarbon group or a heterocyclic group, and these groups each may have a substituent;
   L d  n     d1   M 2B L d  n     d1     (3B)
 
 
         wherein 
         L d  and n d1  represent the same meaning as described above, and 
         M 2B  represents a group obtained by removing from the metal complex represented by the formula (2) two hydrogen atoms directly bonded to a carbon atom or a heteroatom constituting the metal complex; 
       
       
         
           
           
               
               
           
         
         wherein 
         L d  and n d1  represent the same meaning as described above, and 
         M 3B  represents a group obtained by removing from the metal complex represented by the formula (2) three hydrogen atoms directly bonded to a carbon atom or a heteroatom constituting the metal complex. 
       
     
     
         5 . The light emitting device according to  claim 2 , wherein the metal complex represented by formula (2) is a metal complex represented by formula (2-B): 
       
         
           
           
               
               
           
         
         wherein 
         M 2 , n 3 , n 4 , and A 3 -G 2 -A 4  represent the same meaning as described above, 
         E 11B , E 12B , E 13B , E 14B , E 21B , E 22B , E 23B , and E 24B  each independently represent a nitrogen atom or a carbon atom; when there are a plurality of E 11B , E 12B , E 13B , E 14B , E 21B , E 22B , E 23B , and E 24B , they may be the same or different at each occurrence; when E 11B  is a nitrogen atom, R 11B  is absent; when E 12B  is a nitrogen atom, R 12B  is absent, when E 13B  is a nitrogen atom, R 13B  is absent; when E 14B  is a nitrogen atom, R 14B  is absent; when E 21B  is a nitrogen atom, R 21B  is absent; when E 22B  is a nitrogen atom, R 22B  is absent; when E 23B  is a nitrogen atom, R 23B  is absent; and when E 24B  is a nitrogen atom, R 24B  is absent, 
         R 11B , R 12B , R 13B , R 14B , R 21B , R 22B , R 23B , and R 24B  each independently represent a hydrogen atom, an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryl group, an aryloxy group, a monovalent heterocyclic ring, a substituted amino group, or a halogen atom, and these groups each may have a substituent; when there are a plurality of R 11B , R 12B , R 13B , R 14B R 21B , R 22B , R 23B , and R 24B , they may be the same or different at each occurrence; and R 11B  and R 12B , R 12B  and R 13B , R 13B  and R 14B , R 14B  and R 21B , R 21B  and R 22B , R and R 23B , and R 23B  and R 24B  each may be bonded to each other to form a ring together with the atoms to which they are bonded, 
         the ring L 1B  represents a pyridine ring or a pyrimidine ring constituted of a nitrogen atom, a carbon atom, E 11B , E 12B , E 13B , and E 14B , and 
         the ring L 2B  represents a benzene ring, a pyridine ring, or a pyrimidine ring constituted of two carbon atoms, E 21B , E 22B , E 23B , and E 24B . 
       
     
     
         6 . The light emitting device according to  claim 5 , wherein the metal complex represented by formula (2-B) is a metal complex represented by formula (2-B1), a metal complex represented by formula (2-B2), a metal complex represented by formula (2-B3), a metal complex represented by formula (2-B4), or a metal complex represented by formula (2-B5): 
       
         
           
           
               
               
           
         
         wherein 
         M 2 , n 3 , n 4 , A 3 -G 2 -A 4 , R 11B , R 12B , R 13B , R 14B , R 21B , R 22B , R 23B , and R 24B  represent the same meanings as described above, 
         n 31  and n 32  each independently represent an integer of 1 or more, and n 31 +n 32  is 2 or 3; when M 2  is a rhodium atom or an iridium atom, n 31 +n 32  is 3; and when M 2  is a palladium atom or a platinum atom, n 31 +n 32  is 2, and 
         R 15B , R 16B , R 17B , and R 18B  each independently represent a hydrogen atom, an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryl group, an aryloxy group, a monovalent heterocyclic group, a substituted amino group, or a halogen atom, and these groups each may have a substituent; when there are a plurality of R 15B , R 16B , R 17B , and R 18B , they may be the same or different at each occurrence; R 15B  and R 16B , R 16B  and R 17B , and R 17B  and R 18B  each may be bonded to each other to form a ring together with the atoms to which they are bonded. 
       
     
     
         7 . The light emitting device according to  claim 1 , wherein the metal complex represented by formula (1) is a metal complex represented by formula (1-A): 
       
         
           
           
               
               
           
         
         wherein 
         M 1 , n 1 , n 2 , ring R 1A , E 1 , E 11A , E 12A , R 11A , R 12A , R 13A , and A 1 -G 1 -A 2  represent the same meanings as described above, 
         the ring R 2A  represents a benzene ring, a pyridine ring, or a pyrimidine ring constituted of two carbon atoms, E 21A , E 22A , E 23A , and E 24A , 
         E 21A , E 22A , E 23A , and E 24A  each independently represent a nitrogen atom or a carbon atom; when there are a plurality of E 21A , E 22A , E 23A , and E 24A , they may be the same or different at each occurrence; when E 21A  is a nitrogen atom, R 21A  is absent; when E 22A  is a nitrogen atom, R 22A  is absent; when E 23A  is a nitrogen atom, R 23A  is absent; and when E 24A  is a nitrogen atom, R 24A  is absent, and 
         R 21A , R 22A , R 23A , and R 24A  each represent a hydrogen atom, an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryl group, an aryloxy group, a monovalent heterocyclic group, a substituted amino group, or a halogen atom, and these groups each may have a substituent; when there are a plurality of R 21A , R 22A , R 23A , and R 24A , they may be the same or different at each occurrence; R 21A  and R 22A  may be bonded to each other to form a ring together with the atoms to which they are bonded; R 22A  and R 23A  may be bonded to each other to form a ring together with the atoms to which they are bonded; R 23A  and R 24A  may be bonded to each other to form a ring together with the atoms to which they are bonded; and R 11A  and R 21A  may be bonded to each other to form a ring together with the atoms to which they are bonded. 
       
     
     
         8 . The light emitting device according to  claim 7 , wherein the metal complex represented by formula (1-A) is a metal complex represented by formula (1-A1), a metal complex represented by formula (1-A2), a metal complex represented by formula (1-A3), or a metal complex represented by formula (1-A4): 
       
         
           
           
               
               
           
         
         wherein M 1 , n 1 , n 2 , R 11A , R 12A , R 13A , R 21A , R 22A , R 23A , R 24A , and A 1 -G 1 -A 2  represent the same meanings as described above. 
       
     
     
         9 . The light emitting device according to  claim 1 , wherein R 13A  is an aryl group which may have a substituent. 
     
     
         10 . The light emitting device according to  claim 1 , wherein the first light emitting layer further comprises a compound represented by formula (H-1):
   Ar H1 L H2  n     H2   L H1  n     H1   L H2  n     H2    n     H3   Ar H2   (H-1)
   wherein   Ar H1  and Ar H2  each independently represent an aryl group or a monovalent heterocyclic group, and these groups each may have a substituent,   n H1  and n H2  each independently represent 0 or 1; when there are a plurality of n H1 , they may be the same or different; and the plurality of n H2  may be the same or different;   n H3  represents an integer of 0 or more,   L H1  represents an arylene group, a divalent heterocyclic group, or a group represented by —[C(R H11 ) 2 ]n H11 -, and these groups each may have a substituent; when there are a plurality of L H1  they may be the same or different; n H11  represents an integer of 1 or more and 10 or less; R H11  represents a hydrogen atom, an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an aryl group, or a monovalent heterocyclic group, and these groups each may have a substituent; and the plurality of R H11  may be the same or different and may be bonded to each other to form a ring together with the carbon atom to which they are bonded, and   L H2  represents a group represented by —N(-L H21 -R H21 )—; when there are a plurality of L H2 , they may be the same or different; L H21  represents a single bond, an arylene group, or a divalent heterocyclic group, and these groups each may have a substituent; R H21  represents a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group, or a monovalent heterocyclic group, and these groups each may have a substituent.   
     
     
         11 . The light emitting device according to  claim 1 , wherein the first light emitting layer and the second light emitting layer are adjacent to each other. 
     
     
         12 . The light emitting device according to  claim 1 , wherein the second light emitting layer is provided between the anode and the first light emitting layer. 
     
     
         13 . The light emitting device according to  claim 2 , wherein at least one selected from the group consisting of the ring L 1  and the ring L 2  has as a substituent a group represented by formula (D-A), (D-B) or (D-C): 
       
         
           
           
               
               
           
         
         wherein 
         m DA1 , m DA2 , and m DA3  each independently represent an integer of 0 or more, 
         G DA  represents a nitrogen atom, an aromatic hydrocarbon group, or a heterocyclic group, and these groups each may have a substituent, 
         Ar DA1 , Ar DA2 , and Ar DA3  each independently represent an arylene group or a divalent heterocyclic group, and these groups each may have a substituent; and when there are a plurality of Ar DA1 , Ar DA2  and Ar DA3 , they may be the same or different at each occurrence, and 
         T DA  represents an aryl group or a monovalent heterocyclic group, and these groups each may have a substituent; and the plurality of T DA  may be the same or different; 
       
       
         
           
           
               
               
           
         
         wherein 
         m DA1 , m DA2 , m DA3 , m DA4 , m DA5 , m DA6 , and m DA7  each independently represent an integer of 0 or more, 
         G DA  represents a nitrogen atom, an aromatic hydrocarbon group, or a heterocyclic group, and these groups each may have a substituent; the plurality of G DA  may be the same or different, 
         Ar DA1 , Ar DA2 , Ar DA3 , Ar DA4 , Ar DA5 , Ar DA6 , and Ar DA7  each independently represent an arylene group or a divalent heterocyclic group, and these groups each may have a substituent; and when there are a plurality of Ar DA1 , Ar DA2 , Ar DA3 , Ar DA4 , Ar DA5 , Ar DA6 , and Ar DA7 , they may be the same or different at each occurrence, and 
         T DA  represents an aryl group or a monovalent heterocyclic group, and these groups each may have a substituent; the plurality of T DA  may be the same or different;
   Ar DA1  m     DA1   T DA   (D-C)
 
 
         wherein 
         m DA1  represents an integer of 0 or more, 
         Ar DA1  represents an arylene group or a divalent heterocyclic group, and these groups each may have a substituent; and when there are a plurality of Ar DA1  they may be the same or different, and 
         T DA  represents an aryl group or a monovalent heterocyclic group, and these groups each may have a substituent. 
       
     
     
         14 . The light emitting device according to  claim 5 , wherein at least one selected from the group consisting of R 11B , R 12B , R 13B , R 14B , R 21B , R 22B , R 23B , and R 24B  is a group represented by formula (D-A), (D-B) or (D-C): 
       
         
           
           
               
               
           
         
         wherein 
         m DA1 , m DA2 , and m DA3  each independently represent an integer of 0 or more, 
         G DA  represents a nitrogen atom, an aromatic hydrocarbon group, or a heterocyclic group, and these groups each may have a substituent, 
         Ar DA1 , Ar DA2 , and Ar DA3  each independently represent an arylene group or a divalent heterocyclic group, and these groups each may have a substituent; and when there are a plurality of Ar DA1 , Ar DA2 , and Ar DA3 , they may be the same or different at each occurrence, and 
         T DA  represents an aryl group or a monovalent heterocyclic group, and these groups each may have a substituent; and the plurality of T DA  may be the same or different; 
       
       
         
           
           
               
               
           
         
         wherein 
         m DA1 , m DA2 , m DA3 , m DA4 , m DA5 , m DA6 , and m DA7  each independently represent an integer of 0 or more, 
         G DA  represents a nitrogen atom, an aromatic hydrocarbon group, or a heterocyclic group, and these groups each may have a substituent; the plurality of G DA  may be the same or different, 
         Ar DA1 , Ar DA2 , Ar DA3 , Ar DA4 , Ar DA5 , Ar DA6 , and Ar DA7  each independently represent an arylene group or a divalent heterocyclic group, and these groups each may have a substituent; and when there are a plurality of Ar DA1  Ar DA2 , Ar DA3 , Ar DA4 , Ar DA5 , Ar DA6 , and Ar DA7 , they may be the same or different at each occurrence, and 
         T DA  represents an aryl group or a monovalent heterocyclic group, and these groups each may have a substituent; the plurality of T DA  may be the same or different;
   Ar DA1  m     DA1   T DA   (D-C)
 
 
         wherein 
         m DA1  represents an integer of 0 or more, 
         Ar DA1  represents an arylene group or a divalent heterocyclic group, and these groups each may have a substituent; and when there are a plurality of Ar DA1 , they may be the same or different, and 
         T DA  represents an aryl group or a monovalent heterocyclic group, and these groups each may have a substituent. 
       
     
     
         15 . The light emitting device according to  claim 6 , wherein at least one selected from the group consisting of R 11B , R 12B , R 13B , R 14B , R 21B , R 22B , R 23B , and R 24B  is a group represented by formula (D-A), (D-B) or (D-C): 
       
         
           
           
               
               
           
         
         wherein 
         m DA1 , m DA2 , and m DA3  each independently represent an integer of 0 or more, 
         G DA  represents a nitrogen atom, an aromatic hydrocarbon group, or a heterocyclic group, and these groups each may have a substituent, 
         Ar DA1 , Ar DA2 , and Ar DA3  each independently represent an arylene group or a divalent heterocyclic group, and these groups each may have a substituent; and when there are a plurality of Ar DA1 , Ar DA2 , and Ar DA3 , they may be the same or different at each occurrence, and 
         T DA  represents an aryl group or a monovalent heterocyclic group, and these groups each may have a substituent; and the plurality of T DA  may be the same or different; 
       
       
         
           
           
               
               
           
         
         wherein 
         m DA1 , m DA2 , m DA3 , m DA4 , m DA5 , m DA6 , and m DA7  each independently represent an integer of 0 or more, 
         G DA  represents a nitrogen atom, an aromatic hydrocarbon group, or a heterocyclic group, and these groups each may have a substituent; the plurality of G DA  may be the same or different, 
         Ar DA1 , Ar DA2 , Ar DA3 , Ar DA4 , Ar DA5 , Ar DA6 , and Ar DA7  each independently represent an arylene group or a divalent heterocyclic group, and these groups each may have a substituent; and when there are a plurality of Ar DA1  Ar DA2 , Ar DA3 , Ar DA4 , Ar DA5 , Ar DA6 , and Ar DA7 , they may be the same or different at each occurrence, and 
         T DA  represents an aryl group or a monovalent heterocyclic group, and these groups each may have a substituent; the plurality of T DA  may be the same or different;
   Ar DA1  m     DA1   T DA   (D-C)
 
 
         wherein 
         m DA1  represents an integer of 0 or more, 
         Ar DA1  represents an arylene group or a divalent heterocyclic group, and these groups each may have a substituent; and when there are a plurality of Ar DA1  they may be the same or different, and 
         T DA  represents an aryl group or a monovalent heterocyclic group, and these groups each may have a substituent. 
       
     
     
         16 . The light emitting device according to  claim 3 , wherein at least one selected from the group consisting of the ring L 1  and the ring L 2  has as a substituent a group represented by formula (D-A), (D-B) or (D-C): 
       
         
           
           
               
               
           
         
         wherein 
         m DA1 , m DA2 , and m DA3  each independently represent an integer of 0 or more, 
         G DA  represents a nitrogen atom, an aromatic hydrocarbon group, or a heterocyclic group, and these groups each may have a substituent, 
         Ar DA1 , Ar DA2 , and Ar DA3  each independently represent an arylene group or a divalent heterocyclic group, and these groups each may have a substituent; and when there are a plurality of Ar DA1 , Ar DA2 , and Ar DA3 , they may be the same or different at each occurrence, and 
         T DA  represents an aryl group or a monovalent heterocyclic group, and these groups each may have a substituent; and the plurality of T DA  may be the same or different; 
       
       
         
           
           
               
               
           
         
         wherein 
         m DA1 , m DA2 , m DA3 , m DA4 , m DA5 , m DA6 , and m DA7  each independently represent an integer of 0 or more, 
         G DA  represents a nitrogen atom, an aromatic hydrocarbon group, or a heterocyclic group, and these groups each may have a substituent; the plurality of G DA  may be the same or different, 
         Ar DA1 , Ar DA2 , Ar DA3 , Ar DA4 , Ar DA5 , Ar DA6 , and Ar DA7  each independently represent an arylene group or a divalent heterocyclic group, and these groups each may have a substituent; and when there are a plurality of Ar DA1 , Ar DA2 , Ar DA3 , Ar DA4 , Ar DA5 , Ar DA6 , and Ar DA7 , they may be the same or different at each occurrence, and 
         T DA  represents an aryl group or a monovalent heterocyclic group, and these groups each may have a substituent; the plurality of T DA  may be the same or different;
   Ar DA1  m     DA1   T DA   (D-C)
 
 
         wherein 
         m DA1  represents an integer of 0 or more, 
         Ar DA1  represents an arylene group or a divalent heterocyclic group, and these groups each may have a substituent; and when there are a plurality of Ar DA1  they may be the same or different, and 
         T DA  represents an aryl group or a monovalent heterocyclic group, and these groups each may have a substituent.